TN 87866 Ignition Key Set for Tennant Sweepers and Sweeper Scrubbers. Durable metal two key set. Fits Tennant models including Litter Hawk, ATLV 4300, 1550, 355, 385, 550 (sn 6115 and up), 6400, 6500, 6550, 6600, 6650, 7400, 800 (sn 1000-2900), 810 (sn 2000 and up), 8200, 8210, 8400, 8410, M20, M30, T20, and S20. One key set required per unit. Priced per set of 2 keys. Replaces Tennant 87866. Our Part Number TN 87866